Lumber or other wood products that have been either dried by exposure to natural atmospheric conditions outdoors or in an unheated shed or died to equilibrium with the surrounding atmosphere. Moisture content of air-dried wood fiber depends on relative humidity, temperature, and length of drying period. Also referred to as air seasoned and contracts with kiln-dried lumber.
Lumber stacked and stored so that it is dried naturally by the exposure to air.
Timber dried by exposure to air in a yard or shed, without artificial heat (also see seasoning).
This refers to the removal of water in the freshly cut wood without the use of artificial heat. Wood dried in this manner is normally stacked in neat piles separated from each other by sticks of dry wood and allowed to season. The rule of thumb is that it takes one year per inch of thickness plus a year to dry boards. So, for example, a 2 inch thick board takes three years to dry. And 'dry' is relative. In this context it means that the wood is in equilibrium with the surrounding air.
Forced, usually heated, air drying of coatings or inks.
Removing moisture from green wood by exposing to the air usually in a yard without artificial heat. Not a complete drying process for interior woodwork.
Wood that has attained an equilibrium moisture content (e.m.c.) with the environment. Fully air-dried wood may reach a moisture content of 12%.
Air with moisture content lower than the maximum allowable for a given applications.
Wood which has been subjected to air drying. Air dried wood may be expected to have moisture content in the range 17-23% depending upon climate.
Seasoned by exposure to the atmosphere, in the open or under cover, without artificial heat.